EP 0468914 A1 19920129 - Catalyst system for polymerization of 1,3-butadiene to trans-1,4-polybutadiene.
Title (en)
Catalyst system for polymerization of 1,3-butadiene to trans-1,4-polybutadiene.
Title (de)
Katalysatorsystem zum Polymerisieren von Butadien in Trans-1,4-polybutadien.
Title (fr)
Système catalytique pour la polymérisation du 1,3-butadiène en polybutadiène-1,4.
Publication
Application
Priority
US 55827890 A 19900726
Abstract (en)
Trans-1,4-polybutadiene is a thermoplastic resin rather than a rubber at room temperature by virtue of its high degree of crystallinity. Because trans-1,4-polybutadiene contains many double bonds in its backbone, it can be blended and cocured with rubbers. It is accordingly an attractive alternative to conventional fillers such as carbon black, which are typically utilized in compounding rubber. By utilizing the catalyst system and techniques of this invention, trans-1,4-polybutadiene can be synthesized at a high level of conversion. This invention specifically relates to a process for the synthesis of trans-1,4-polybutadiene by an anionic polymerization process which comprises: (a) adding an organolithium compound and an alkali metal alkoxide as a catalyst system to a polymerization medium containing 1,3-butadiene monomer and an organic solvent; and (b) allowing the 1,3-butadiene monomer to polymerize at a temperature which is within the range of about -10 DEG C to about 45 DEG C to produce the trans-1,4-polybutadiene.
IPC 1-7
IPC 8 full level
C08F 4/00 (2006.01); C08F 4/42 (2006.01); C08F 4/48 (2006.01); C08F 36/04 (2006.01); C08F 136/06 (2006.01)
CPC (source: EP KR US)
C08F 4/00 (2013.01 - KR); C08F 136/06 (2013.01 - EP US)
C-Set (source: EP US)
Citation (search report)
[X] US 3294768 A 19661227 - WOFFORD CLINTON F
Designated contracting state (EPC)
DE ES FR GB IT NL
DOCDB simple family (publication)
US 5037912 A 19910806; BR 9103130 A 19920505; CA 2036655 A1 19920127; DE 69116762 D1 19960314; DE 69116762 T2 19960919; EP 0468914 A1 19920129; EP 0468914 B1 19960131; ES 2084800 T3 19960516; JP H04233915 A 19920821; KR 100196884 B1 19990615; KR 920002642 A 19920228; MX 9100222 A 19920228
DOCDB simple family (application)
US 55827890 A 19900726; BR 9103130 A 19910722; CA 2036655 A 19910219; DE 69116762 T 19910723; EP 91630045 A 19910723; ES 91630045 T 19910723; JP 18656591 A 19910725; KR 910012807 A 19910725; MX 9100222 A 19910715